Tutorial 43 Enum Types: Basic and Advanced Usage

//Tutorial 43 Enum Types: Basic and Advanced Usage
//Enums are lists of constants. When you need a predefined list of values which do not represent some kind of numeric or textual data, you should use an enum.
//For instance, in a chess game you could represent the different types of pieces as an enum:
/*
enum ChessPiece {
PAWN,
ROOK,
KNIGHT,
BISHOP,
QUEEN,
KING;
}
*/

//---------------------------------------------------------------------------------------------------------------------------------------
//App.java
public class App {


    public static void main(String[] args) {

        Animal animal = Animal.CAT;
        switch(animal) { //click on the warning>"add missing case statements" to add cases
        case CAT:
            System.out.println("CAT");
            break;
        case DOG:
            System.out.println("DOG");
            break;
        case MOUSE:
            break;
        }
        //Let's look at more advance uses of enums:
        System.out.println(Animal.DOG);

        System.out.println(Animal.DOG.getClass());

        System.out.println(Animal.DOG instanceof Enum); //"instanceof" operator tells us if the object is an instance of(created from a particular class) the class(true or false). in this case when you run it, it should be: true

        //3*
        System.out.println(Animal.MOUSE.getName());

        System.out.println("Enum name as a string: " + Animal.DOG.name()); //get actual name of Enum


        Animal animal2 = Animal.valueOf("CAT"); //use static method "valueOf" to get name of the Enum constants //in this instance it should say "Fergus" when you run it
            System.out.println(animal2);

    }

}

//---------------------------------------------------------------------------------------------------------------------------------------
//Animal enum
//rightclick on default package>new>Enum:
public enum Animal {
    //CAT, DOG, MOUSE
    // 3* You can give enum types a constructor
    CAT("Fergus"), DOG("Fido"), MOUSE("Jerry");

    private String name;
    Animal(String name){
        this.name = name;

    }
    public String getName() { //source>GettersandSetters>check name field
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }

    public String toString(){
        return "This animal is called: " + name;
    }
}

//---------------------------------------------------------------------------------------------------------------------------------------
/* Run results:
CAT
This animal is called Fido
class Animal
true
Jerry
Enum name as a string: DOG
This animal is called Fergus
*/